Results 21 to 30 of about 1,152,645 (265)

Optimizing Baffle Length for Mixed Convective Flow Within a Ventilated Square Cavity with Discrete Heat Sources Mounted at Side Walls [PDF]

open access: yesJournal of Heat and Mass Transfer Research
Mixed convection within a ventilated square cavity with a baffle at the bottom wall and heating elements at the side walls has been analyzed. The inlet opening has been set at the bottom of the left wall, while the exit opening is put at the bottom of ...
Saad Been Mosharof   +3 more
doaj   +1 more source

Adaptive Fuzzy Neural Network PID Algorithm for BLDCM Speed Control System

open access: yesMathematics, 2021
Because of its simple structure, high efficiency, low noise, and high reliability, the brushless direct current motor (BLDCM) has an irreplaceable role compared with other types of motors in many aspects. The traditional proportional integral derivative (
Hongqiao Yin   +4 more
doaj   +1 more source

Effect of mummy powder and Pulicaria gnaphalodes extract on growth performance, immune system and intestine morphology of broiler chickens [PDF]

open access: yesپژوهشهای علوم دامی ایران, 2021
Introduction Mummies are the brown or black hydrocarbon that are produced deep layers of earth or mountain and contain a significant percentage of benzoic acid, humic acid, and folic acid, fatty acids, inulin, and resins.
Faezeh Ahmadzade   +3 more
doaj   +1 more source

A New Stiffness Performance Index: Volumetric Isotropy Index [PDF]

open access: yesMachines, 2019
A new index for a precise calculation of a manipulator’s stiffness isotropy is introduced. The proposed index is compared with the conventionally used stiffness isotropy index by making use of the investigation on R-CUBE manipulator. The proposed index is shown to produce relatively more precise results from which a higher number of isotropic poses are
İbrahimcan Görgülü   +1 more
openaire   +4 more sources

Role of refractive index in metalens performance [PDF]

open access: yesApplied Optics, 2019
Sub-wavelength diffractive optics, commonly known as metasurfaces, have recently garnered significant attention for their ability to create ultra-thin flat lenses with extremely short focal lengths. Several materials with different refractive indices have been used to create metasurface lenses (metalenses).
Elyas Bayati   +4 more
openaire   +3 more sources

Integrated High-Performance Platform for Fast Query Response in Big Data with Hive, Impala, and SparkSQL: A Performance Evaluation

open access: yesApplied Sciences, 2018
This paper first integrates big data tools—Hive, Impala, and SparkSQL—which support SQL-like queries for rapid data retrieval in big data. The three introduced tools are not only suitable for operating in business intelligence to serve high ...
Bao Rong Chang   +2 more
doaj   +1 more source

The Reliability of Linear Speed with and without Ball Possession of Pubertal Soccer Players

open access: yesJournal of Functional Morphology and Kinesiology, 2023
Reliable fitness tests with low day-to-day and trial-to-trial variation are a prerequisite for tracking a player’s performance or for identifying meaningful changes in training interventions.
Nikolaos Manouras   +4 more
doaj   +1 more source

Empirical Degradation Models of the Different Indexes of the Proton Exchange Membrane Fuel Cell Based on the Component Degradation

open access: yesEnergies, 2023
To describe the degradation of proton exchange membrane fuel cells (PEMFCs), empirical degradation models of different indexes of PEMFCs are established. Firstly, the simulation process and assumptions of PEMFC degradation are proposed.
Lei Fan   +4 more
doaj   +1 more source

Optimal decision for the satellite navigation system under navigation countermeasures based on spoofing effect evaluation results

open access: yesIET Control Theory & Applications, 2023
This paper realizes the evaluation and optimal decision of the spoofing effect on the global navigation satellite system (GNSS) under navigation countermeasures based on the game perspective, to overcome the limitations of current relevant research ...
Yue Wang, Fu‐Ping Sun, Xian Wang
doaj   +1 more source

Performance Comparison of the Single Axis and Two-Axis Solar System using Adaptive Neuro-Fuzzy Inference System Controls [PDF]

open access: yesE3S Web of Conferences, 2020
Solar energy is one of the renewable energy that gets more attention from many countries. Solar photo voltaic (PV) takes the right position to get the maximum energy yield. The study was conducted by comparison of performance with two methods of tracking
Imron Chairul   +5 more
doaj   +1 more source

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